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Well, I won't show you the exact stats. I will just share my experience so far.
I've set a targeted campaign at Adhitz and so far I'm getting good results. Maybe not GOOD, but not bad. My campaign doesn't eat a lot of money daily and I get a lot of impressions. I only pay for the clicks, the impressions are free :)
I advertise an older paid to click site, maybe that's why I get average results. A new site will do much better, I'm sure of it. I will probably try to promote a less popular PTC site later.